sky

When it’s really clear at night and there aren’t a lot of lights around, you can look up at the sky and see lots and lots of stars. But you’d be amazed by just how many star are up there that your eyes can’t see! Read on to count up the stars and be star-struck by the math in the sky.

It’s cool to look up in the sky and see a rainbow. What’s even neater is to see 4 at once, which happened the other day! Read on to do the colorful math behind this quadruple rainbow.